7 ton gantry crane is perfect choice for light and frequent choice. It has various types to choose, such as motorized gantry crane, durable truss gantry crane, flexible rolling gantry crane, powerful industrial gantry crane, lightweight semi gantry crane, cantilever lifting gantry etc. All these cans can be used together with wire rope hoist or electric wire rope hoist to improve efficiency. Ellsen Group, one of reliable crane manufacturers in China, supplies gantry cranes with great quality and price. Buy Ellsen crane to save energy and cost!
The reasons that lifting mechanism vibrates during work
Why lifting mechanism vibrates during work? There are four specific reasons. First is the user operates the crane incorrectly, second is mechanical throttle control is not flexible, third is that hoisting balance valve becomes deformed or jammed when starting the spring, fourth is that the crane brake can’t brake flexibly.
There are five reasons for brake failure, first is that lifting brake starts for long time, the braking oil pressure is low. Second is that the spring pressure is too high to open the braking plate. Third is the braking plate is jammed. Fourth is that the vent pipe deflates not enough. Fifth is that the processing of braking shaft spline is not good.
How to measure the quality of trolley line?
The lifting crane trolley line, used for dust and moisture condition, can be matched with anti-dust sealing strip. The travelling speed of collector is less than 300m/min.
Monopole combination lifting crane trolley line, it has convenient installation and fast speed, about 500m/min.
Rigid body crane trolley line, it is used for high current equipment. Current can amount to thousands of Ann.
Tube-type crane trolley line, it can combine according to different numbers of poles. And the current can reach thousands of Ann.
Ellsen portable 7 ton gantry crane for sale
1. Light weight, easy operation
2. Compact structure, simple maintenance
3. Small size, flexible move
4. Various types, strict producing standards
5. Long service term, low failure rate
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